Q4/ For each signal shown in Figure Q4, (a) Write out the numeric sequence, and mark the index n = 0 by an arrow. (b) Write an expression for each signal using impulse functions. (c) Write an expression for each signal using steps and/or ramps. (d) Find the signal energy. (e) Find the signal power, assuming that the sequence shown repeats itself. x[n] Signal 1 8 x["] Signal 2 111 IT x[n] Signal 3 x[n] Signal 4 til. Whe 8

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